i

$)$

$$Describe oxygen sag analysis and state parameters affecting self

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purification

ii

$)$

$$Describe different types of Manholes used in sewerage network. State the purpose for

which these are provided.

iii

$)$

$$Describe different variant of activated sludge process used in sewage treatment

iv

$)$

$$Describe MBBR

$.$

$$What advantages it offers over activated sludge process?

v

$.$

$$Sewer shape and materials used for construction.

vi

$)$

$$Describe self

$-$

cleansing and limiting velocity for sewer design.